Предмет: Математика, автор: Бестолач

для ремонта школы привезли 475 штук одинаковых по массе красных керпичей и 425 штук такихже по массе белых кирпечей. Масса всех кирпичей 3.600кг. Найди массу красных и белых кирпечей в отдельности *** для ремонта школы привезли 900штук белых и красных кирпичей, одинаковых по массе. Масса всех красных кирпечей 1.900кг, а белых - 1.700кг. найди количество красных и белых кирпечей в отдельноссти

Ответы

Автор ответа: snow1999
0

1)475+425=900(штук)-всего кирпичей                                                                2)3600:900=4(кг)-масса одного кирпича                                                           3)4*475=1900(кг)-масса красных кирпичей                                                        4)4*425=1700(кг)-масса белых кирпичей

Автор ответа: momot
0

475+425=900шт всего,

3600/900=4кг один кирпич,

4*475=1900кг красных,

4*425=1700кг белых

 

 

******

(1900+1700)/900=4кг один кирпич,

1900/4=475шт красных,

1700/4=425шт белых

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Помогите пожалуста
Проверочная работа Present Simple
1. Добавь нужное окончание –s или –es к глаголам.
1. fly – 5. brush –
2. read – 6. cross –
3. play – 7. dance –
4. watch – 8. have-

2. Поставь глагол в нужную форму.
1. Her father (work).
2. Masha (drink) tea every morning.
3. The road to the school (take) a lot of time.
4. My friends (go) on a bus.
5. We (play) tennis in school on Wednesday afternoon.
1. Peter (like) his job.
2. I (come) here very often.
3. I always (play) tennis in the summer.
4. My father (go) swimming every Saturday.
5. Fred and Lena (understand) this rule.
6. Tom (know) how to swim.


3. Сделайте предложения отрицательными.
1. I study French.
2. School finishes at two o´clock.
3. You copy from other students.
4. We think English is easy.
5. My friends play volleyball.
6. I watch TV on Saturday morning.
7. She speaks Chinese.
8. The dog likes cats.
9. They listen to pop music.
10. I play with my hamster every day.

4. Запишите вопросы и дайте краткие ответы.
1. live / in / you / Do / Moscow / ? No, _______
2. in / students / Do / the canteen / ? / eat Yes, _______
3. to school / your brother / on Saturday / ? / Does / go No, _______
4. live / near / Do / your friends / you / ? Yes, _______
5. at / school/ finish / Does / three o´clock / ? No, _______

5. Раскрой скобки, поставь глагол в нужную форму.
I 1(to get up) at 7.30. We 2(to eat) breakfast, 3(to brush) teeth and 4(to go) to the classes. We 5(to have) English classes every day. After classes we 6(to play) the games. I 7(to live) with a friend here. He 8(to speak) English very well. He 9(to have) a big family and they 10(to call) him very often. We 11(to play) with other children. In the evenings we 12(to sit) near the fire and our teacher 13(to sing) songs. We never 14(to get) bored here. I 15(to like) this place very much.

6. Complete the sentences with the following verbs. Вставьте в предложения следующие глаголы.
play cost meet open sleeps speaks teach wash go like

These shoes are very expensive. They …. A lot of money.
I … Tom every day after school. We go for a walk in the park.
Liza … three foreign languages and she’s very proud of it.
They always … football in the park near the house.
The shops in Holland ….. at 9 o’clock every morning.
Mrs. Black is a very good teacher. She … Spanish to foreign students.
Tim … his car on Saturdays after work.
We don’t …. to the theatre because my husband doesn’t … it.
Tommy …. every day after lunch.